I'm always pretty skeptical of the worry that this will be restricted to wealthy. For one, I don't think it would (or at least not for long), but additionally,

I'm always pretty skeptical of the worry that this will be restricted to wealthy. For one, I don't think it would (or at least not for long), but additionally, won't that just mean that the people with these benefits will just out compete the rest? So over time everyone alive will have whatever the benefits are even if slowly. This is just a much faster version of natural selection. In other words, in the long run it won't matter is all I'm saying.